<template>
  <div class="upload-container">
    <el-upload
      :action="action"
      :headers="headers"
      :multiple="false"
      :limit="1"
      :before-upload="beforeUpload"
      :on-success="onSuccess"
      :on-error="onError"
      :on-remove="onRemove"
      :file-list="fileList"
      :on-exceed="onExceed"
      :disabled="disabled"
      drag
      show-file-list
      accept="application/epub+zip"
      class="image-upload"
    >
      <i class="el-icon-upload" />
      <div v-if="fileList.length === 0" class="el-upload__text">
        请将电子书拖入或者<em>点击上传</em>
      </div>
      <div v-else class="el-upload__text">图书已上传</div>
    </el-upload>
  </div>
</template>

<script>
import { getToken } from "@/utils/auth";
export default {
  props: {
    fileList: {
      type: Array,
      default() {
        return [];
      },
    },
    disabled: {
      type: Boolean,
      default: false,
    },
  },
  data() {
    return {
      action: `${process.env.VUE_APP_BASE_API}/book/upload`,
    };
  },
  computed: {
    headers() {
      return {
        Authorization: `Bearer ${getToken()}`,
      };
    },
  },
  methods: {
    beforeUpload(file) {
      this.$emit("beforeUpload", file);
    },
    onSuccess(response, file) {
      const { code, msg, data } = response;
      if (code === 0) {
        // 上传成功
        this.$message({
          message: msg,
          type: "success",
        });
        this.$emit("onSuccess", data);
      } else {
        // 上传失败
        this.$message({
          message: (msg && `上传失败，失败的原因是${msg}`) || "上传失败",
          type: "error",
        });
        this.$emit("onError", file);
      }
    },
    onError(err) {
      console.log({ err });
      const errMsg = err.message && JSON.parse(err.message);
      this.$message({
        message:
          (errMsg && errMsg.msg && `上传失败，失败原因是 ：${errMsg.msg}`) ||
          "上传失败！",
        type: "error",
      });
      this.$emit("onError", err);
    },
    onRemove() {
      this.$message({
        message: "电子书删除成功",
        type: "success",
      });
      this.$emit("onRemove");
    },
    onExceed() {
      this.$message({
        message: "每次只能上传一本电子书",
        type: "warning",
      });
    },
  },
};
</script>

<style lang="scss" scoped>
</style>